Lifting of plows



4 W. G. CRESSWELL.

LLFTING 0F FLOWS.

APPLICATION FlLEn-1AN.7.1918.

25 quickly with a AregularY andpositive action VVIIM'JIANIIk GEORGE CRESSWELL, OFVBECKENHAM, CHRISTCHURCH, NEW ZEALAND. 'l

LIFTING or rLows.V

To all fw/wmz't may concern.' i y n Be it known'that I, WILLIAM GEORGE CRnsswnLL, a subject of the King of Great Britain, residing at B6 Tennyson street, Beckenham, Christchurch, in the Dominion of New Zealand, have invented new and use ful Improvements .in and Relating to the Liftingof Plows, of which the following is a specification.

This invention relates to plows, and

although speciallyadapted for use in conjunction with tractors, is applicable also to horse-drawn implements.

Inn@ vvofrig. 4, and looking in the A'direction of the arrow I-Iitherto, various means have been devised for enabling the plow to be liftedout'of the furrow when desired, asfor instance,when turning at the head-lands.y rIhese means, however, although vcapable of operating satisfactorily in land yofan even and regular nature, have Yproved vimpracticable for use where large stones yand other obstructions are encountered; Y

Itis the object of the present invention, therefore, to provide a vnovel, construction for Vthis purpose lcapable of operating in anyclass of land.

In carrying' this object into effect, the 1nvention consistsessentially in obtaining the necessary power for. the lift from the rotationrof the land-wheelof Vthe implement. In order that the nature lof the invention may be fully understood, reference will now be made to the accompanying sheet'of drawings in which Figure l is a perspective view'of aportion ofa plow showing, by way of example, one practical method of applying theinvention, Y

Fig. 2 is also' a'vperspective view of a portion of such plow' as viewed fromv a position in front of the implement, and,

Fig. 3, isa plan view of thev land-wheel illustrating in detail the means of carrying out the invention as already shown in the preceding figures. Fg.v 4 is an enlarged detail viewshowing a portion Yof the apparatus shown in the preceding views; y p Y Fig. 5 is 'a sectional view, taken on the l is the plow which may be ofany of the types at -presentfemployed for performing the usual land-wheel 2.

various kinds of work andI provided withY i y l f n 'the upper end ofthe shaft 10` isvmounted l Application med January '7, 191s.

and most practical however, any Y employed to place the Specification of Letters Patent. f VPatented cit. 19, 1920.

serial nemer/91. y'

As here shown, the land-wheel is mounted bylmeans of a cranked axle 3 carried in bearings in the plow-frame so as toenable the lifting of the plow-frame tobe effected by turning or rocking the axle. As this is c v the customary construction embodied in most plows `and has been adopted almost universally as being method of" performing this purpose, the present invention, in order probably the simplest y that it may be fully understood and appreciated by those skilled in the art to which it relates, is h erein described and illustrated in its application thereto. It must be clearly understood, however, that Vthe invention is not confined totany such combination with i this or any other known feature of plow construction, but'includes within its scope, as hereinbefore mentioned, a means for ob-V taining' from the rotation of the"land-wheel the power `necessaryfor lifting the `plow-` frame, which powermayy be applied in any suitable manner.` v Y n According yto the present invention, a

drum 4 is Vprovided 'and lrevolu'bly mounted upon the axle 3' adjacent to the Vland-wheel 2, clutchv means being provided to enable the said drum tol be brought into engagement with, so as to berotated by the land-wheel or thrown out of engagement therewith.

As here shown, this purposeis effected by making theY drum l slidable upon the axle and providing the outer that is the faceladjacent to the land-wheel ssy face of, such drum, y

with Voneor more projections 5 adapted when y such drum is caused to approach the landwheel, to be engaged by the spokes of the latter. `In lieuV of `this simplev construction, other. formv of clutch ,may be with the land-wheel. .l Y For the'fpurpose of operating the said clutch means,'suitable striking gear is prolvided. As here shown, this str ikin -gear comprises a rod 6` s li'dablel in guides ried uponl the axle 3, such Vrodrbeing"providedwith a fork 8'. adapted to engage a groove 9 formed in the boss of thedrunret. Forthe pnr'pose'of operatingthe rod 6, a

drum-in or out of gear v shaft l0 is provided and arranged to extend Aupwardly in bearings l1 carried upon the axle 3; Upon the lowerlend of the said shaft -10 is provided an eccentrice'plate or cam 12 adaptedto lengage between plates or collars 1 3' upon the rod 6, while vupon of a chain or otherflexible connection 16"V which is led around a sheave-block 17 mounted at a suitable point upon the low-frame in rear of the land-wheel, and rom whence such chain is led forward again and attached at its other extremity either to the cranked portion of the axle 3,

or, as here shown, to a suitableextension or arm 18 rovided thereon. *y

For t 1e purpose of locking the axle 3 in the required position to retain the plow-k frame in the raised condition, the usual .i hand-lever 19 Vis provided, such hand-lever having a detent 2O adapted to engage in a notch 21 provided in a quadrant 22 as customary. Upon the vhand-lever 19 is provided a short lever 23 adapted tov release the i said detentwhen operated asby means of a cord 24 connecting it with the tractor or the drivers position in the case of a horsedrawn implement. when thev In operation, low is performing its work, the clutch will be in the dissuch engaged conditionV and consequently the land-wheel 4will be free to revolve .without the drum. When it is desired vto lift the plow, however, the trip or striking rgear* is operated by placing a tension upon lthe cord 15, thus causing the clutch to come into operation and so connect the drum 4 with the land-wheel. AS the implement continues to travel in this condition, the landwheel will cause the drum-to rotate and so wind around its periphery the chain 16. The tensionl so placedupon thechain, will, by reason of the fact that the other end of chain is attached to the arm 18 upon the cranked axle 3, cause such axle to turn and in consequence, raise the plow-frame in the vwell-known manner. n

vProvision is made also for causing the .clutch to automatically release the drum from engagement with the land-wheelupon the plow-frame being raised tothe required extent. As here Shown, such means comprise achain or other connection 25 ofthe required length attached at one end to the n' lever 14, while its other endis attached to the plow-frame at a suitable point asy 26 in rear of theaxle 3. By this arrangement,

vwhile the plow-frameis in the lower or operative., position,` the chain 25 will be slack, as shown in Figjl, and will therefore permit ofthe lever 14 being operated when desired by*V means of the cordl. In consequence of the fact thaty the shaft 10 is mounted upon lthe axle 3 however, it will be understood that'the turning of the latter in the operation of raising the plow-frame, as alreadyy explained,"will increase the dis- -serve to return the lever 14 to position,

` wheel.

tance between the lever 14 and the point 26,

thus drawing the chain 25 intotension. The

length of the chain 25 i's such-'as 'to' permit the raising to continue until the detent 2O comes into engagement with thernotch 21,

4whereupon such chain becoming taut, will its vroriginal and so .cause the striking gear to disengage the clutch and release the drum,

the plow-frame being retained in the upward condition solely bythe engagement of the detent 20 inthenotch 21.v Inorder to make this releasing action of the clutch as quick and positive as possible, a spring may be provided, the tendency of `which is to carry the rod 6 into the disengaged position.

The plow frame, having lbeen thus raised,

and the clutch thrown out of gear,rit will be understood that the drum 4being free upon the` axle, will permit the chain to become slack and so allow of the plow-frame again resuming its downward or operative position'when the detent of the land-lever is re- Y leased from the notch by the .action-of placing a tension upon the cord 24.4 In cases where there is atendency onthe part .of the land-wheel toskid in consequence of. its grip upon the surface ofthe land being insufli-y cientto effect the rotation of the drum, the periphery of such wheelV may be .provided with suitable studs 28,',as shown in Figs. 1 an 2.

.If so desired, this method of lifting may y be applied so risel on any neously with as to cause the plow-frame tov or all of its wheels simultathe lifting upon the land- This purpose may be effected in a variety of diiferent cases kwhere the wheels are mounted by means of an upwardly extending stem received withinv guides in the plow-frame, as is the common practice, levers or chains may ways as for instance, in j be employed to cause the stem to slidein its -Y guides and so vary the height of the plow frame, such levers or chainsbeing controlled and operated by the axle 3 or directly by the chainl. i It will be obvious also that, should the land-wheel itself be mounted in a similar manner by means, of a stem slidabley in guides inv thel plow-frame, inv lieu of the cranked axle,'the pull of the chain-16 may be applied so as to cause rise upon the stem.

As hereinbefore explained, however, these known details of plow construction are dealt with in the present specification merely by way of illustration in order that the inventionfmay be the better understood from a consideration of some possible methods of applying it.

ing a plow-frame,; plow means rigidly the plow-frame to i ofthe type described compris- Y Y mounted thereon, a land-wheel, a cranked axle therefor adapted to be turned for the purpose of raising or lowering the said plow-frame in relation to the-land-wheel, means for maintaining the'plow-frame in the raised condition, a drum revolubly mounted upon the said cranked axle and slidable thereon into and out of engagement with the land-wheel7 and a chain adapted to turn the cranked axle thereby to raise the plow-frame, of a rod disposed parallel with said'movement of the drum and slidable iny guides carried upon the cranked axle, a fork carried upon said rod and adapted to engage within a circumferential groove formed around the boss of the said drum, a pair of collars mounted upon said rod at a suitable interval apart, a Vshaft carried in bearings upon the cranked axle and disposed at right angles with said rod, an eccentric or f cam a crank or lever mounted Aupon the upper end of the shaft and adapted to cause the drum to engage the land-wheel and a connecting memberextending between Vthe said crank of the shaft anda suitable fixed point upon the plow. In testimony whereof I have hereunto set PERCY RICHMOND CLUNIE, SIDNEY JAMES TRELEAVEN.

carried Aupon the lowerend ofl said shaft and adaptedto engage between said collars, 

